I've not frequented psychics frequently, but was struck on those few occasions by their earnestness. How could they really believe what they're saying, when it appears to be clear nonsense? I've finally found my answer.

Presenting the Criminal Code of Canada, section 365, "pretending to practice witchcraft".

365. Every one who fraudulently
(a) pretends to exercise or to use any kind of witchcraft, sorcery, enchantment or conjuration,
(b) undertakes, for a consideration, to tell fortunes, or
(c) pretends from his skill in or knowledge of an occult or crafty science to discover where or in what manner anything that is supposed to have been stolen or lost may be found,
is guilty of an offence punishable on summary conviction.

This basically outlaws fraudulent psychic services. Here is a helpful cheat sheet for all you aspiring magic types as to what you may and may not do, according to this not-lawyer:

don't	do
charge money to talk to the dead	place a voodoo death-curse for free
pretend to locate water with wiggly sticks	use actual occult powers to locate water, and zombies
commercially fortune-tell	write fortune cookie Deep Thoughts for free public dispenser
forget to write "for entertainment only" in tiny print, if engaged in the above	get this stupid law thrown out on a Charter basis

In short: if you're pretending earnestly, you're safe. If you're earnestly pretending, you're a criminal. Or something.